<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>元素显示类型-块元素</title>
    <style>
        div{
            width: 200px;
            height: 200px;
            background: yellow;
        }
        /* 
        块元素：
        display：block；
        display: list-item;
        */
        /* p标签不能嵌套div标签：p标签放文本可以，不能放块级元素  */
    </style>
</head>
<body>
    <div> </div>
    <div> </div>
    <ul>
        <li>1111</li>
        <li>2222</li>
        <li>3333</li>
    </ul>
    <p>111111</p>
    <p>222222
        <div>box</div>
    </p>
    <h1>title</h1>
</body>
</html>